Split PST Tool - Version 2.2 Your Outlook not working properly the reason might be large sized PST file. Large PST files affects the performance of Outlook like slow processing and many more. We can split PST files folder so that our data can be maintained and accessed without any trouble. We can improve our Outlook speed and even we can maintain data by split PST tool.Like if someone wants to access some specific record from a specific date and if we will search whole data it will be time consuming, now we can use split PST tool. Split PST tool has the option to split PST by date, by using this option our search will be more convenient and time saving.Split PST tool gives the option to split PST file in different versions:• Split PST 2000.